EASTENDERS dropped a humungous bombshell on viewers tonight as the secret son of Grant Mitchell arrived in Albert Square with a bang.

Mark Fowler Jr. wandered into Walford without a care in the world, just days after Phil Mitchell learned of his nephew’s identity in a letter that Michelle had written to Peggy, which Sharon had kept hidden.

Unsurprisingly, Phil chose to shun his wife’s desperate pleas and gave his brother’s son a quick call.

In turn, Phil managed to convince the youngster to pay him a visit.

"I wasn't sure if this was the right address,” the teen, played by Ned Porteous said, as he arrived at Marin Fowler’s flat.

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And, it wasn’t long before Mark’s debut caused a raucous on Twitter, with most viewers playfully taking the time to comment on the actor’s good looks.

“Mark Junior played by @NedPorteous is already my fave character on EastEnders,” teased one audience member, as another agreed: “Looking forward to this new hunk joining the @bbceastenders #EastEnders family. Mark Fowler Jr. @NedPorteous”

One more beamed: “Mark Fowler Jr. looks pretty hot #EastEnders.”

This particularly excitable fan enthused: “Mark in EastEnders is very nice.”

BBC

Martin Fowler was stunned to see his nephew

BBC

Viewers compared the soap newcomer to John Travolta

And a fifth followed: “Why hello Mark Fowler Jr!”

Others were very confused by his arrival, most notably Lord Alan Sugar, who like so many others, believed the character had died many moons ago.

“I thought Mark Fowler left @bbceastenders years ago HIV positive, didn't he die? So who is Mark Fowler junior,” he wrote.